java编程加载窗口，制作动画（屏保泡泡）

1.整体的结构图：



2.编写GameFrame02.java代码：

package cn.bjsxt.test;

import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class GameFrame02 extends Frame {

Image image = GameUtil.getImage("images/sun.jpg");

public void launchFrame() {
setSize(500, 500);
setLocation(100, 100);
setVisible(true);

new PaintThread().start();

addWindowListener(new WindowAdapter() {
// 单击右键选择“source”中的“override/implement
// methods”，frame里面勾选“windowClosed”点击“OK”
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}

private double x = 100, y = 100;
private boolean left;
private boolean up;

// 单击右键选择“source”中的“override/implement
// methods”，window里面勾选“paint(graphic)”点击“OK”
@Override
public void paint(Graphics g) {

g.drawImage(image, (int) x, (int) y, null);
if (left) {
x -= 3;
} else {
x += 3;
}
if (x > 500 - 130) {
left = true;
}
if (x < 0) {
left = false;
}

if (up) {
y -= 5;
} else {
y += 5;
}
if (y > 500 - 130) {
up = true;
}
if (y < 30) {
up = false;
}

}

class PaintThread extends Thread {

public void run() {
while (true) {
repaint();
try {
Thread.sleep(40);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}

}

public static void main(String[] args) {
GameFrame02 gf = new GameFrame02();
gf.launchFrame();
}

}


3.编写GameUtil.java的代码：
package cn.bjsxt.test;

import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;

public class GameUtil {

private GameUtil() {
}

public static Image getImage(String path) {
URL u = GameUtil.class.getClassLoader().getResource(path);
BufferedImage image = null;
try {
image = ImageIO.read(u);
} catch (IOException e) {
e.printStackTrace();
}
return image;
}

}


4.运行之后的结果：